diff --git a/services/tunnelbroker/test/CryptoToolsTest.cpp b/services/tunnelbroker/test/CryptoToolsTest.cpp
new file mode 100644
index 000000000..d9b0204ba
--- /dev/null
+++ b/services/tunnelbroker/test/CryptoToolsTest.cpp
@@ -0,0 +1,45 @@
+#include "CryptoTools.h"
+#include "Constants.h"
+#include "Tools.h"
+
+#include <gtest/gtest.h>
+
+#include <string>
+
+using namespace comm::network;
+
+class CryptoToolsTest : public testing::Test {};
+
+TEST(CryptoToolsTest, TestOperationsOnRsaVerifyStringSuccess) {
+  const std::string publicKeyBase64 =
+      "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGC8M8FdRSSEdfAufY/V5iP6cB"
+      "crXdeZa19OjpbbNvq9qAT2FobnYrlNI8p3y/2LvJBxlR9VlvS0Nh4HLZLdmf8zOf"
+      "3HyN0w8ey54xE5eIILZi1Xudrk8J+U5xij78Bzl2WdAvoVCiVbaodff8DBvmqHeR"
+      "/EDcMX3ipPDzjcCFXwIDAQAB";
+  const std::string verifyMessage = "testverifymessagetestverifymessage";
+  const std::string validSignatureBase64 =
+      "tn5w317+CcuUdK8JRvM0GW+m65ph7sHqlbpY5PhYZtl1hlb86ILgmlCaa+"
+      "O7icLImcLQkVsabCaVkczrJOy95jvT251gAKBZAXc4oDNqg4n5An3GmwHzbh50Z40M9gwXG/"
+      "zx6ReEYvgqDo9e1cimljewFykHt8ApBX6mbJ8ShyM=";
+  EXPECT_EQ(
+      crypto::rsaVerifyString(
+          publicKeyBase64, verifyMessage, validSignatureBase64),
+      true);
+}
+
+TEST(CryptoToolsTest, TestOperationsOnRsaVerifyStringFail) {
+  const std::string publicKeyBase64 =
+      "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGC8M8FdRSSEdfAufY/V5iP6cB"
+      "crXdeZa19OjpbbNvq9qAT2FobnYrlNI8p3y/2LvJBxlR9VlvS0Nh4HLZLdmf8zOf"
+      "3HyN0w8ey54xE5eIILZi1Xudrk8J+U5xij78Bzl2WdAvoVCiVbaodff8DBvmqHeR"
+      "/EDcMX3ipPDzjcCFXwIDAQAB";
+  const std::string verifyMessage = "testverifymessagetestverifymessage";
+  const std::string invalidSignatureBase64 =
+      "Opuw317+CcuUdK8JRvM0GW+m65ph7sHqlbpY5PhYZtl1hlb86ILgmlCaa+"
+      "O7icLImcLQkVsabCaVkczrJOy95jvT251gAKBZAXc4oDNqg4n5An3GmwHzbh50Z40M9gwXG/"
+      "zx6ReEYvgqDo9e1cimljewFykHt8ApBX6mbJ8dfrM=";
+  EXPECT_EQ(
+      crypto::rsaVerifyString(
+          publicKeyBase64, verifyMessage, invalidSignatureBase64),
+      false);
+}